Kentucky Educational Television (KET)

The Inter-City Relay (ICR) television network is a microwave radio system configured in 58 hops to provide simplex circuits for simultaneous distribution of three separate audio/visual programs from the Lexington-based production center to 15 educational television stations throughout the Commonwealth. It also provides separate simplex circuits for audio/visual program material to Lexington upon command from the production center.

The Lexington production center is equipped with a video switch control panel that allows any of the nine remote educational television studios, the BOC, or capitol to be selected. When Lexington selects a studio, a pushbutton control causes a control signal to be transmitted over the alarm network of the message microwave system to the required video IF switches for the selected studio. The switches align the studio with the Lexington production center, and also terminate unused remote studio network links. Six video switch locations accomplish the necessary switching functions throughout the entire video system.